Improvement in globe lamp-chimneys



J. H. WHITE. Globe-Lamp Chimney.

No. 216,007. Patented May 27,1879.

UNITED STATES PATENT OFFICE.

JAMES H. II HITE, OF NEW YORK, N. Y., ASSIGNOR TO MANHATTAN BRASSCOMPANY, OF SAME PLACE.

IMPROVEMENT IN GLOBE LAMP-CHIMNEYS.

Specification forming part of Letters Patent No. 216,007, dated May 27,1879; application filed December 13, 1878.

To all whom it may concern:

Be it known that I, JAMEs H. WHITE, of the city and State of New York,have invented an Improvement in Globe Lamp-Chimneys,

.of which the following is a specification.

Globular glasses have been provided with a metal plate or annulusresting upon the top thereof, the opening of which is of a size adaptedto regulate the ascending current of air passing through thelamp-burner;and in some instances bulb-chimneys for lamps have been provided with ametallic top, to give the necessary height to the chimney.

My improvement relates to the combination, with a globular glass, of ametallic trumpetshaped top, so shaped at its lower edge that it willrest tightly upon the glass regardless of slight inequalities in theshape of the glass, and clasping-springs, that pass into the top of theglass and hold the metal top thereupon.

In the drawings, Figure 1 is a vertical section of said globe-chimney,and Fig. 2 is an im'erted plan of the metallic top or cap.

The glass globe a is of any usual or desired size or shape. It isgenerally preferable to employ a spheroidal glass; but the same may bemore or less elongated or flattened.

The upper part of the glass is rounding, and terminates with a plainedge to the circular opening, as usual, and the edge or rim 2 of themetallic trumpet-shaped top 0 rests upon the surface of the glass, andsaid edge is curved downwardly sufficiently to cause it to touch theglass, regardless of any slight variation in the size of the opening orthe shape of the glass.

The metal top is trumpet-shaped, of the proper height, and with anopening of the' correct size to insure the required draft to the lamp,and it is preferable to terminate the top part of this metal trumpetwith a slightlyflaring mouth, e, as shown, in order that lateralcurrents of air may be deflected, and not make the lamp smoke orflicker.

Upon the under surface of the trumpetshaped top the spring-clips d areriveted, and they are of a size and shape to enter within the top edgeof the'glass globe and spring outwardly, so as to hold the metal top inplace upon the glass, but allow of its disconnection,

if desired; and these spring-clips (I may be bent so as to accommodatethe different-sized openings of the glass globes.

Around the trumpet-shaped metal top there is a vertical or nearlyvertical crown, l, of ornamental sheet-metal open-work, and the loweredge is secured by the edge of the trumpet top being folded back uponthe base-flange of the crown. This retains the crown and stiff ens theedge of the trumpet top.

I am aware that metal tops for lamp chi1nneys have been provided withspring-clips that pass either inside or outside a cylindrical chimney. Iam also aware that a heater adapted to rest upon a glass globe has beenprovided with an ornamental crown around a watervessel. I donot,therefore, claim either device separately. I

I claim as my invention- 1. The trumpet-shaped sheet-metal top,with itslower edge adapted to rest upon a globular glass lamp-chimney, andprovided with sheetmetal spring-clips d, riveted upon the under side ofthe said top, so as to enter within the globe, substantially as setforth.

2. The metallic crown, in combination with the sheet-metaltrumpet-shaped lamp-chimney top, the flange of the crown being confinedby the edge of the top, substantially as set forth.

Signed by me this 7th day of December, A. D. 1878.

JAMES H. WHITE.

Witnesses:

HAROLD SERRELL, Guns. E. S ITH.

